目录

1.产品概述       2.产品特点     oRh嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）oRh嘉泰姆

5.产品封装       6.电路原理图  oRh嘉泰姆

7.相关产品oRh嘉泰姆

   产品概述 返回TOPoRh嘉泰姆

     CXUS7744是一种双通道的电源开关芯片，内部集成了两个95mΩ 的P型MOSFET功率管，每个通道各有一个逻辑使能控制信号。当负载超出限制范围或者有短路情况发生的时候，芯片会进入限流模式，把负载电流控制在安全区域内，同时拉低限流指示信号OCB(s)，CXUS7744的每个通道的限流电流设置典型值均在1A，并且具有fold back功能；如果持续存在超重负载或者短路情况，芯片内部温度和功耗将迅速上升，芯片将检测到过温状况，并自动进入保护状态，切断功率通道以防止芯片损毁；另外，CXUS7744还具有检测输入电源的功能，功率管会维持关断直到电源电压超过欠压阈值范围。OCB(s)是具有开漏输出的限流标记引脚，8ms的延时功能可以屏蔽错误的限流信号，防止芯片向主机系统发出错误的指示。例如大电容负载接入导致的短期限流情况的发生。CXUS7744可以在芯片关断的时候阻断反向电流的发生。CXUS7744封装采用8引脚的SOP封装，工作温度范围是(-40℃to +85℃)。The CXUS7744 incorporates dual 95mΩ P-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input. When either output load exceeds the current-limit threshold or a short is present, the device limits the outputs current to a safe level by switching into a constant-current limit mode with fold back, pulling the over-current (OCB(s)) logic output low. When continuous heavy overloads or short-circuits increase the power dissipation in the switches, causing the junction temperature to raise, a thermal protection circuit shutdown the switches to prevent damage. Internal Under Voltage Lock-Out (UVLO) circuitry ensures that the switches remain off until valid input voltage is present. Each power switch is designed to set current limit at 1A typically. OCB(s) are open-drain outputs which are asserted when over-current occurs. A 8ms fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot-swapping a capacitive load, preventing false alarms to the host system. The CXUS7744 eliminates any reversed current flow across each switch when it is powered off. The ECXUS7744is available in 8-pin SOP package, operates over the extended (-40 to ℃ +85 ) temperature ℃ range.

   产品特点 返回TOPoRh嘉泰姆

• 双通道95 mΩ High-Side MOSFEToRh嘉泰姆

• 1A限流电流，且具有fold-back功能oRh嘉泰姆

• 工作电压范围:2.7V to 5.5VoRh嘉泰姆

• 300μs 输出电压上升时间oRh嘉泰姆

• 欠压保护功能oRh嘉泰姆

• 15μA 静态电流oRh嘉泰姆

• 1μA 关断电流oRh嘉泰姆

• 低电平逻辑使能控制oRh嘉泰姆

• 芯片关断后没有反向电流oRh嘉泰姆

• 具有延时功能的开漏输出限流指示信号oRh嘉泰姆

• SOP-8,SOP-8(EP)封装oRh嘉泰姆

• 符合RoHS规范及Pb-FreeoRh嘉泰姆

Dual 95m
High-Side MOSFEToRh嘉泰姆

1A (CXUS7744) Current Limits with Fold-backoRh嘉泰姆

1.5A (CXUS7744-15) Current Limits withoRh嘉泰姆

Fold-backoRh嘉泰姆

Operating Range:2.7V to 5.5VoRh嘉泰姆

300μS Typical Rise TimeoRh嘉泰姆

Under voltage LockoutoRh嘉泰姆

15μA Quiescent Supply CurrentoRh嘉泰姆

1μA Shutdown Supply CurrentoRh嘉泰姆

Logic Level Enable Pin, Available withoRh嘉泰姆

Active-Low VersionoRh嘉泰姆

No Reverse Current when Power OffoRh嘉泰姆

Open-Drain Over-Current Flag Outputs withoRh嘉泰姆

fault-blankingoRh嘉泰姆

Available in SOP-8 and SOP-8 (EP) PackagesoRh嘉泰姆

RoHS Compliant and 100% Lead(Pb)-FreeoRh嘉泰姆

Halogen-FreeoRh嘉泰姆

   应用范围 返回TOPoRh嘉泰姆

• High-Side 电源开关oRh嘉泰姆

• USB 电源管理系统oRh嘉泰姆

• USB主机和自供电的总线系统oRh嘉泰姆

• USB总线供电系统oRh嘉泰姆

• 热插拔电源分配系统oRh嘉泰姆

• 电池充电系统oRh嘉泰姆

• 短路保护系统oRh嘉泰姆

High-Side Power Protection SwitchoRh嘉泰姆

USB Power ManagementoRh嘉泰姆

USB Host and Self-Powered BubsoRh嘉泰姆

USB Bus-Powered HubsoRh嘉泰姆

Hot Plug-In Power SuppliesoRh嘉泰姆

Battery-Charger CircuitsoRh嘉泰姆

Short-Circuit ProtectionsoRh嘉泰姆

   技术规格书（产品PDF) 返回TOP oRh嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！oRh嘉泰姆

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产品封装图 返回TOPoRh嘉泰姆

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电路原理图 返回TOPoRh嘉泰姆

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